<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <link href="index.css" rel="stylesheet" type="text/css">
    </head>
    <body>
        <div id="ep-1">
            <button @click="show = !show">
                click
            </button>
            <transition name="slide-fade">
                <p v-if="show">hello</p>
           </transition>
        </div>
        <script src="vue.js"></script>
        <script src="index.js"></script>
    </body>
</html>